Pop legend Britney Spears can now add "lifesaver" to her bio. When 13-year-old Maegan Johnson from Phenix City, Ala. suffered from a ruptured brain aneurysm and stroke at age 7, Spears' famous song "Toxic" helped Johnson recover from her injuries, after a 10-hour brain surgery left her unable to speak for six weeks.

"I had to communicate on a dry erase board and became very depressed," Johnson wrote on her Facebook page. "I [didn't] want to smile or communicate. Special visitors came to the hospital like cheerleaders, clowns and dogs for therapy to cheer us up, but nothing worked."

"Toxic" was the unexpected musical medicine that gave Johnson her life back. When the hit song played, she tried to dance to its catchy beat -- a promising first step to recovery. The song then became part of Johnson's regular treatment. Check out her awesome moves:

This video has since gone viral, and Britney herself responded to Johnson's miraculous experience: "Thank you for sharing your incredible story, Maegan! I’m so inspired by you and I’m touched my music helped you get through such a difficult time. ‪#‎JustKeepDancing‬, sweetie!! You are AMAZING! ❤❤❤"